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Finding the Fourth Proportional to 91,562,916.90, 137,344,375.35 and 30,978,642.90

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Solution

The fourth proportional to 91,562,916.90, 137,344,375.35 and 30,978,642.90 is: 46,467,964.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,562,916.90 : 137,344,375.35 = 30,978,642.90 : x
  2. Step 2: Convert to fraction form
    91,562,916.90/137,344,375.35 = 30,978,642.90/x
  3. Step 3: Cross multiply
    91,562,916.90x = 137,344,375.35 × 30,978,642.90
  4. Step 4: Simplify right side
    91,562,916.90x = 4,254,742,358,291,212
  5. Step 5: Solve for x
    x = 4,254,742,358,291,212/91,562,916.90
  6. Step 6: Final answer
    x = 46,467,964.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.